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//                           UNCLASSIFIED
/*-------------------------------------------------------------------------
RAYTHEON PROPRIETARY: THIS DOCUMENT CONTAINS DATA OR INFORMATION
PROPRIETARY TO RAYTHEON COMPANY AND IS RESTRICTED TO USE ONLY BY PERSONS
AUTHORIZED BY RAYTHEON COMPANY IN WRITING TO USE IT. DISCLOSURE TO
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OUTSIDE RAYTHEON COMPANY WITHOUT THE EXPRESS WRITTEN APPROVAL OF RAYTHEON
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THIS PROPRIETARY NOTICE IS NOT APPLICABLE IF DELIVERED TO THE U.S.
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UNPUBLISHED WORK - COPYRIGHT RAYTHEON COMPANY.
-------------------------------------------------------------------------*/
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using NLog;
using Raytheon.Instruments;

namespace ProgramLib
{
   /// <summary>
	/// Thread to read tactical UART data
	/// </summary>
   internal class TacticalUartReadThread : BasicThread
   {
      private ILogger _logger;

      public static ConcurrentQueue<byte[]> _byteQueue = new ConcurrentQueue<byte[]>();

      /// <summary>
		/// Constructor
		/// </summary>
      public TacticalUartReadThread()
      {
         _logger = LogManager.GetCurrentClassLogger();
         _byteQueue = new ConcurrentQueue<byte[]>();
      }

      ~TacticalUartReadThread()
      {
         _logger.Debug($"Waiting for {this.GetType().Name} to exit...");
         WaitForExit();
      }

      /// <summary>
		/// Method that executes on the thread.
		/// </summary>
      protected override void DoWork()
      {
         _logger?.Debug($"{this.GetType().Name}::{System.Reflection.MethodBase.GetCurrentMethod().Name}() is running...");

         string serialDeviceInstanceName = Program.Instance().ProgramSpecificConfig.ReadValue("UART_INFO", "SERIAL_DEVICE_INSTANCE_NAME");
         ICommDevice _serialDevice = (ICommDevice)Program.Instance().InstrumentManager.GetGenericInstrument(serialDeviceInstanceName);
         DateTime startDateTime = DateTime.Now;
         const int MAX_PBIT_WAIT_SEC = 17;

         try
         {
            byte[] receiveByteArray = null;
            uint numBytesRead = 0;
            do
            {
               try
               {
                  numBytesRead = _serialDevice.Read(ref receiveByteArray);
                  List<byte> bytelist = receiveByteArray.ToList();
                  _byteQueue.Enqueue(bytelist.Skip(0).Take((int)numBytesRead).ToArray());
               }
               catch { }

               TimeSpan ts = DateTime.Now - startDateTime;

               if (ts.TotalSeconds > MAX_PBIT_WAIT_SEC)
                  break;
            }
            while (true);
         }
         catch (Exception ex)
         {
            _logger.Error(ex.Message + "\n" + ex.StackTrace);
         }

         _logger?.Debug($"{this.GetType().Name}::{System.Reflection.MethodBase.GetCurrentMethod().Name}() is exiting...");

      }
   }
}